System of telephony and telegraphy



Oct. 21 1.924,.- 1,512,293

, W. W. M LAREN SYSTEM'OF TELEPHONY AND TELEGRAPHY Filed Aug. 5, 1922 Patented Oct. 21, 1924.

WILLIAM W. MULAREN, OF BIRMINGHAM, ALABAMA, ASSIGNOR OF ONE-FOURTH TO I. C. BEATTY, OE BIRMINGHAM, ALABAMA.

SYSTEM OF TELEPHQNY AND TELEGRAPHY.

Application filed August 5, 1922.

T 0 all whom it may concern:

Be itv known that I, VVILLIAM W. Mo- LAREN, a citizen of the United States, residing at Birmingham, in the county of Jefien son and State of Alabama, have invented a new and useful System of Telephony and Telegraphy, of which the following is a specification.

It is the object of this invention to provide novel means whereby the time constant may be cut down in submarine cables, par ticularly, in connection with deep sea work, and to provide novel means whereby telephonic or telegraphic communication may be carried on with increased rapidity over cables of considerable length.

In the drawing, the device is shown in a single diagram.

In the drawing, the main conductor is marked by the numeral 10 and is grounded on shore as indicated at 11, telephone receivers l2 beinginterposed in th conductor 10. Auxiliary conductors 14 are provided, and extend out to sea, the conductors 14 being grounded on shore as indicated at 15, and being grounded at sea, as designated by the numeral 25. The primary windings 16 of inductance coils ar interposed in the auxiliary conductors 14 at points adjacent to the grounds 25, the secondary windings 17 of the inductance coils 'being interposed. in the main conductor 10. A variable inductance 18 and a variable capacity 19 may be interposed in the conductor 14.

Secondary circuits 20 are shown and in them are located the primary windings 21 of inductance coils, cooperating with the secondary windings 22 of the coils, the wind ings 22 being located in the circuits 20. In the others of the'secondary circuits 20 are located the primary windings 21 of inductance coils, the secondary windings 22' being interposed in the main conductor 10.

Serial No. 579,849.

In each of the circuits 20 is located a source 23 of electrical energy. Transmitters 24 are located in the circuits 20 and are so located that they will operate in unison. A single transmitter so constructed as to vary the current in the circuits 2O simultaneously or nearly so, will answer the purpose.

When the transmitters 24 are in use, the

inductance coil 2l-22 causes a current to flow through the conductor lat, an inducedcurrent being produced in the conductor 10 at the coil 16-1-7 and having an important boosting effect on the current proceeding through. the-conductor 10 by way of the inductance coil 21 -22 What is claimed is In a device of the class described, a main conductor; an auxiliary conductor ground ed intermediate the ends of the main conductor; a means for receiving signals interposed in the main conductor; an inductance coil including a primary winding located in theauXiliary conductor adjacent to the place where the auxiliary conductor is grounded, the secondary winding of the coil being interposed in the main conductor; secondary circuits means for transmitting signals interposed in the secondary circuits; sources VWILLIAM W. lvlcLAR-EN. lVi-tnesses J. W. ToMLINsoN, HERBERT I. BLISS.

cuits, the secondary Winding of one coil be, 

